A first medical instrument is for cutting and coagulating patient tissue and includes a two-pronged end effector. The end effector has a first prong which includes a medical ultrasonic blade, has a second prong which includes an arm opposing the ultrasonic blade, and has a surgical knife. A second medical instrument is for a medical instrument for cutting and coagulating patient tissue and includes a two-pronged end effector. The end effector has a first prong which includes a first bipolar radio-frequency electrode, has a second prong which includes an arm opposing the electrodes, and has a surgical knife.